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ڵλãֻг
ͼ3GƵ
2001-11-05 15:05ù۲챨ߣ
1030գһѰζͶЭھǩ𣬱ŽͶԪͨǡ3G׼֮еһߡʱǿ룬ʹֱø˷룬TD-SCDMA׼ĴƵŽܵ

ʵġı

Ŀǰȫƶͨϵͳ׼Уʵʽ׼һͨ˾CDMA2000ŷɰšŵǵȹ˾ǣͷWCDMAйƹ˾ӵȹ˾TDS-CDMAϵͳ

ͨ3Gġðա򼫾ߴɫʡ1999ҹ˾ΪһƥTD-LASΪģɱ3G׼ᡣ200012£רҵ־WIRELESS WEEK(ܿ)ѡȫͨ߷չDZ20ҡߡУͰΨһһҺļ޺йĹ˾

Ȼȥ꣬ڱͨŶ³ҵΪš֮Ĺʵ֯ù˾شۡʵ׼ϵ3G׼УûTD-LAS׼

ŷҿƵĹʵʵϲͨļ׼Ϊ֪ŵļҪǵWCDMACDMA2000ǵв󡱣ҵʿ˵֮ԴƵŵTDS-CDMA׼ܹͨΪŷҵҵΪƵı׼Dzܹв

Ŀǰƶ׼ĺļƵ˫йƵŵı׼ʱ˫ʱ˫ļڸϺѽԱ֤ͨŷ̻Ѿϣҵ߽ͣļֻȽؼӵоһܹܿ˫ս3G֮ͨĸ⡱

ʵˣ⽫ŷͨųͨʵˣһıΪһƵı׼ձȷϣ̴ֻģIJƷҵ˵ʱ˫ûֻƷãƵŵļûʵ顱ҵ˵ַյʧйûһܹܵˡ

ʸΪ

ҵΪȫƶͨӰĻ֮һ1963꣬ѧ粩ʿѧλ˺Ľʮ䣬һֱͨпо64ʵƶͨŲǵ건ʵҸճһţ79꣬ITT(ʵ绰Ƽ˾)רŴ¾ͨоʱθù˾ž85̫꣬ƽ绰˾зܣ89ù˾Ӣִṫ˾󡱲ִṫ˾ܼϯѧҡλƶͨŴҵĴдȫһйطͨŵרڶƶͨű׼ڵӪ֯ARTSϯְʱȷϡ˵ͶͨŵĴҵһ޴Ķע

1999ҵ˱ʵѧڷTD-LASΪ֮ѡͬ7ڰݼʱƼʱƼڵɱпίͶ110ķͶʣͨŹ˾ʮ걱пίεdzθù˾³SPRINT PCSܾ֣ͦʿعܲá

110ԪͶȻ޷3G׼о󡣴˺ͨŹ˾Ⱥκʣ缯šIDGINTELġ˽ļͶ֮һ׼ŵȵλǧԪ

뷽ʷĺֻͨŹʼƻеһ֡ҵ͸¶ҹڴ͹ҵֺͨĿԣͨŵĿڹ10ڡ

һǵķչȷʵҪʽ𣬸ҪǣͨҪһʹ˾һй˾ȻļķߺйŶӶǻˣͨĿǰʱΪһԶ׼ʵǣͶʽṹҪ˵йҵܻ൱ѡҲΪйҲǮDzⷽͶʣǵij˵ǺγйҵͶأҵ͸¶ŷʽĽ룬ͨԸijơ-

±׼ǰ;δ

ڼ֮⣬һֱҪҵҵչϵ̽͵ѡ෽򣬶θĺdzֿǷպһսԾ񡱣1031磬ͨгܾ߼ߣſейδÿ2000ڵƶͨгȻſеĻȫԼ֪ʶȨ

û˸ԤⷽѡսͶʺӮ䡣ҵͨе˵ƵŵTD-SCDMA׼Ѿں̶ܴϵõ֧֣Ҫ֧һֱ׼

ʷϿһƶͨű׼20꣬ǰľҲб׼вƷһֲƷʵƷƷʺòʵϵı׼ڵ׼ûԸ⻨ôʱôĽǮȥо׼ˡҵ˵ܹɹı׼һҪ50ûĴģ飬ҪƶӪ̵ϡͨŵĹһǼӽTD-LASIJҵ飬ڹ飬Ǵ󶼷ŵϺУ߱£ͨȵĹ˾УϺ飬ռȫչʾǸйӪ̵ĺйƶй̸ͨ󶼲Ըϡҵ˵ⲻ⣬ΪӪ̶ڳı׼ӪûҪ±׼ƷҪΪ忼ǵսԶ

TD-LASˣҵ˵ʹйɹʵڲУǽԱ֤ҹ˾ᱻͶߡʵڲԸ¹һҵ˵ĹؼȽյ龰ԳƸչ60ꡢΪƶͨҵڼ

ݼ˽ȷϢ118գˡڵй18ƶ绰̽ƼͨŹҵˣʱֳ5ӹ飬ؼĺзʢᣬȱƵš

ĵַ:http://www.cnonline.org/2001/article/1610.html

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